Which expression is a measurement of density? 20 g/cm 2 5.2 cm 3 0.71 mg 5.13 kg/L

I have posted the answetr in this picture.

Answer:

Determine the value of the oxidation numbers of atoms or ions on the reactant side and the product side.

Explanation:

A redox reaction involves some ions, and atoms losing electrons and other gaining them in the same reaction. When oxidation occurs, there is loss of electrons by an element thus its oxidation number increases; becomes more positive. When reduction occurs an element gains electrons and the oxidation  number becomes more negative; reduces.

If an element (s) behaves in this manner in the whole reaction, then be sure to deduce that a redox reaction has occurred.

Answer:

If oxidation state changes, it is a redox reaction

Explanation:

Answer:

The answer is...

Explanation:

Constructive Interference

Answer:

[tex]\boxed{\text{phase}}[/tex]

Explanation:

When two waves are in phase, their peaks and troughs line up.

They undergo constructive interference, and the amplitude of the resulting wave is larger than either of the individual waves.

In the diagram below, the two red waves are in phase, and they combine to give a new wave (green) with a greater amplitude.

Answer:

7.3

⋅

10

−

2

Explanation:

Answer:yo yo

Explanation:

123

Answer: Option (D) is the correct answer.

Explanation:

When a dog runs faster then due to more force applied by the foot there occurs large footprints of the dog.

Spaces between the feet of dog increases due to running faster as running makes an individual to take long steps.

Whereas when a dog walks normally then  his footprints will be smaller in size.

Therefore, we can conclude that the BEST alternative to Rob's conclusion is that one of the dogs ran faster than the other.

Answer:

Explanation:

1. The smallest complete unit of a compound or diatomic gas

ATOM

Atoms are small tiny particles that makes up a molecule. It is regarded as the smallest indivisible particle that parts in a chemical reaction.

2. A new substance formed by the combination of two or more different atoms

COMPOUNDS

Compounds are substances composed of two or more kinds of atoms. Their properties differs from those of the constituent elements that combines to make them up.

3. Path of electrons around an atomic nucleus

SHELL

The shell describes the path of an electron round a nucleus

4. A substance consisting of only one type of atom

MONOATOMIC MOLECULE

It is an aggregate of one type of atom.

For apex The answer is b

In the equation Zn + 2HCl → ZnCl₂ + H₂, suppose 11 grams of zinc react with 12 grams of hydrogen chloride to form 16 grams of zinc chloride and an unknown amount of hydrogen gas. 7 grams of hydrogen gas will form. Therefore, option B is correct.

With the atomic number 30 and the symbol Zn, zinc is a chemical element. When the oxidation is removed, zinc transforms into a shiny-greyish metal that is slightly brittle at normal temperature. It is the first element in the periodic table's group 12

Oysters are the best source of zinc, but it is also abundant in red meat and fowl. Beans, almonds, crab, lobster, whole grains, breakfast cereals, and dairy products are additional excellent sources.

A non-metal hydrogen is displaced by a metal zinc in a single displacement reaction. As a reductant metal, zinc (Zn) dispenses hydrogen (H₂) from an aqueous solution of HCl to produce zinc chloride (ZnCl2) and hydrogen gas (H₂).

Thus, 7 grams of hydrogen gas will form, option B is correct.

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Answer:

1. Potential energy

2. Potential and kinetic energy

3. Kinetic energy

4. Potential and kinetic energy

5. Potential energy

Explanation:

As shown in picture <3 !!

The list associated with a pendulum as it cycles from the choices below are:

1. Potential energy.

2. Potential and kinetic energy.

3. Kinetic energy.

4. Potential and kinetic energy.

5. Potential energy.

Potential energy is the energy that is the saved in the still state of any object or stored form of energy before it starts to motion.

The kinetic energy is the energy used to perform any work or the energy used when any object is in motion.

Thus, the correct options are 1. Potential energy., 2. Potential and kinetic energy.3. Kinetic energy., 4. Potential and kinetic energy., 5. Potential energy.

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Answer:

12.0107

Explanation:

Hope this helps!

Answer:

N is reduced; P is oxidized;

5HNO₃ + 2H₂O + 3P ⟶ 5NO + 3H₃PO₄  

Explanation:

Probably the easiest way to balance the equation is to use the ion-electron method.

Step 1. Write the skeleton equation

HNO₃ + P ⟶ H₃PO₄ + NO

Step 2. Separate into two half-reactions.

HNO₃ ⟶ NO

P ⟶ H₃PO₄  

Step 3.  Balance all atoms other than H and O

Done

Step 4. Balance O by adding H₂O molecules to the deficient side.

HNO₃ ⟶ NO + 2H₂O

4H₂O + P ⟶ H₃PO₄  

Step 5. Balance H by adding H⁺ ions to the deficient side.

3H⁺ + HNO₃ ⟶ NO + 2H₂O

4H₂O + P ⟶ H₃PO₄ + 5H⁺

Step 6. Balance charge by adding electrons to the deficient side.

3H⁺ + HNO₃ + 3e⁻ ⟶ NO + 2H₂O

4H₂O + P ⟶ H₃PO₄ + 5H⁺ + 5e⁻

The N atom is reduced because it gains electrons. The P atom is oxidized because it loses electrons.

Step 7. Multiply each half-reaction by a number to equalize the electrons transferred.

5 × [3H⁺ + HNO₃ + 3e⁻ ⟶ NO + 2H₂O]

3 × [4H₂O + P ⟶ H₃PO₄ + 5H⁺ + 5e⁻]

Step 8. Add the two half-reactions.

15H⁺ + 5HNO₃ + 15e⁻ ⟶ 5NO + 10H₂O

12H₂O + 3P ⟶ 3H₃PO₄ +15H⁺ + 15e⁻  

15H⁺ + 5HNO₃ + 15e⁻ + 12H₂O + 3P ⟶ 5NO + 10H₂O + 3H₃PO₄ + 15H⁺ + 15e⁻

Step 9. Cancel species that occur on each side of the equation

15H⁺ + 5HNO₃ + 15e⁻ + 2(12)H₂O + 3P ⟶ 5NO + 10H₂O + 3H₃PO₄ + 15H⁺ + 15e⁻

becomes

5HNO₃ + 2H₂O + 3P ⟶ 5NO + 3H₃PO₄  

Step 10. Check that all atoms are balanced.

[tex]\begin{array}{ccc}\textbf{Atom} & \textbf{On the left} & \textbf{On the right}\\\text{H} & 9 & 9\\\text{N} & 5 & 5\\\text{O} & 17 & 17\\\text{P} & 3 & 3\\\end{array}[/tex]

Step 11. Check that charge is balanced

[tex]\begin{array}{cc}\textbf{On the left} & \textbf{On the right}\\0 & 0\\\end{array}[/tex]

Everything checks. The balanced equation is

5HNO₃ + 2H₂O + 3P ⟶ 5NO + 3H₃PO₄  

Number of protons in the nucleus of an atom.

Answer:

The Atomic Number of an atom is the number of protons it contains (which are located in the nucleus of the atom).

Answer:

Neutral (no net charge)  

Explanation:

Protons - Positive

Electrons - Negative

Neutrons - No charge

Why?

Neutrons are the particle in an atom with a (as the name suggests)  neutral charge. They are neither positive nor negative, unlike protons or electrons.

Hey there! :D

This is a true statement. Gamma radiation comes from electromagnetic energy from radioactive decay. This decay has the shortest electromagnetic wave lengths and therefore has the highest photon energy. It is extremely dangerous. Radiation in general is something to be cautious of!

I hope this helps!

~kaikers

Answer:

thermal

Explanation:

I can confirm that the answer you have to type down is thermal.

Answer:

Peatification and coalification

Explanation:

https://energyeducation.ca/encyclopedia/Coal_formation

Answer: Option (D)

Explanation: In order to form coal, two processes might be undergone and they are as follows-

Thus the correct answer is option (D).

Answer:

Infrared radiation lies between the visible and microwave portions of the electromagnetic spectrum. Infrared waves have wavelengths longer than visible and shorter than microwaves, and have frequencies which are lower than visible and higher than microwaves.

Explanation:

Answer:

2.65 atm.

Explanation:

where, P is the pressure of the gas in atm.

V is the volume of the gas in L.

n is the no. of moles of the gas in mol.

R is the general gas constant,

T is the temperature of the gas in K.

(P₁T₂) = (P₂T₁).

P₁ = 3.0 atm, T₁ = 30°C + 273 = 303 K,

P₂ = ??? atm, ​T₂ = -5°C + 273 = 268 K.

∴ P₂ = (P₁T₂)/(T₁) = (3.0 atm)(268 K)/(303 K) = 2.65 atm.

Answer:

"Ecosystem is the major ecological unit. It has both structure and functions. The structure is related to species diversity. The more complex is the structure the greater is the diversity of the species in the ecosystem. The functions of ecosystem are related to the flow of energy and cycling of materials through structural components of the ecosystem."

Explanation:

Answer:

A. Fault blocks

Explanation:

The block mountains are formed by pieces of the crust that breaks down and pieces are pushed up by the movement of the crust around them.  These type of mountains usually have a steep and a slope side, due to the irregular nature of the fracture.  Example of such mountains are the Sierra Nevada mountains in North-America.

They're not caused by the collision of two tectonic plates, like most of the mountains of our planet.

Answer: A. fault blocks

Explanation: Fault-block Mountains - Fault-block mountains are formed along fault lines (the edge between plates).

The huge chunks of rock on either side of the fault are called fault blocks. As the tectonic plates

move, some of the fault blocks are pushed up, while others are pushed down. This difference in

elevation (height) forms fault block mountains. The Sierra Nevada Mountains in the western United

States are fault-block mountains.

Answer:

A modern statement is: Avogadro's law states that, "equal volumes of all gases, at the same temperature and pressure, have the same number of molecules." For a given mass of an ideal gas, the volume and amount (moles) of the gas are directly proportional if the temperature and pressure are constant.

Answer:

Pressure - Inversely proportional to volume.

Pressure & Volume - Directly proportional to the number of moles.

Volume - Standard is 22.4L.

Temperature - Directly proportional to the average kinetic energy. and Standard is 273K.

All - Relationship determined by Ideal Gas Law.

Answer:

3 Hz

The frequency is three waves per second, or 3 Hz.                                                                

titanium electronic configuration

3d2 4S2

Answer:

The answer is: Potassium because is the first element in period four.

Explanation:

Ok, the electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals.  Since 1s can only hold two electrons, the next 2 electrons are in the 2s orbital. Then put six in the 2p orbital and put the next two electrons in the 3s. Now, move to the 3p where it is place the next six electrons. Then  shift to the 4s orbital where we place the remaining one electron. Therefore the Potassium electron configuration will be:

[tex]1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{1}[/tex]

Answer:

The answer is location B

Explanation:

All spinal cord levels have a dorsal horn, which is made up of sensory nuclei that take in and interpret incoming somatosensory information. Ascending projections arise from there and carry the sensory data to the diencephalon and midbrain.

A column of nerve fibers that extends from the skull base to the middle of the back. It has three thin membrane-like layers of protecting tissue covering it. The vertebrae encircle the spinal cord and its surrounding membranes.

At least some of the neurons in the superficial dorsal horn continue to be selective for the modalities represented by the primary afferent ends.

The dorsal horn, one of the spinal cord's divisions of grey matter, houses neurons that enter ascending sensory pathways as well as interneurons that link to other spinal cord cells. The substantial gelatinosa is present.

Thus, The initial relay for afferent impulses from the body's skin, muscles, and viscera is located in the dorsal horn of the spinal cord.

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Answer: it's c

Explanation:

Among nuclear fusion reaction, radioactive decay, nuclear fission reaction, and a chemical reaction, a nuclear fusion reaction requires the most energy to get started.

Out of the options provided, a nuclear fusion reaction requires the most energy to get started. Fusion is the process where two light atomic nuclei combine to form a heavier nucleus. This process releases a tremendous amount of energy, but initiating it requires significant energy to overcome the electrostatic forces repelling the positively charged nuclei. In comparison, radioactive decay, a nuclear fission reaction, and a chemical reaction require less initial energy as they generally occur spontaneously under the right conditions.

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Answer:

6.26 mol.

Explanation:

no. of moles (n) = mass/molar mass.

mass of NaHCO₃ = 526.0 g, Molar mass of NaHCO₃ = 84.007 g/mol

∴ no. of moles (n) of NaHCO₃ = mass/molar mass = (526.0 g)/(84.007 g/mol) = 6.26 mol.

Answer:

The functional group

Explanation:

A functional group defines a hydrocarbon. an ester the functional group is an O- alkyl group while that one of an alcohol is -OH group. An aldehyde is a functional group on its own.

Answer: the functional group

Explanation:

Functional groups are specific group of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules.

1. Esters have functional group [tex]-O=C-OR[/tex].

Example: methyl ethanoate with molecular formula [tex]CH_3COOCH_3[/tex]

2. Alcohols have functional group [tex]-OH[/tex].

Example: Propanol with molecular formula [tex]CH_3CH_2CH_2OH[/tex]

3. Aledydes have functional group [tex]-O=CH[/tex].

Example: propanal with molecular formula [tex]CH_3CH_2CHO[/tex]

Thus esters , alcohols and aldehydes may have same number of carbon atoms and similar branching pattern but different functional groups.

Answer:

light energy to convert carbon dioxide and water into glucose and oxygen gas. Each molecule of glucose essentially “stores” up to 38 molecules of ATP which can be broken down and used during other cellular reactions.

Explanation:

Answer:

Plants use sunlight to make glucose.

Its solar energy. Plants use the sun for energy.

Hope This Helps!  Have A Nice Day!!

an alkene because there is a double bond

Final answer:

2-Octene is an alkene, a type of unsaturated aliphatic hydrocarbon with a double bond between the second and third carbon atoms in its eight-carbon chain. The double bond's position is what allows us to classify it as an alkene, in line with its general formula CnH2n.

Explanation:

A hydrocarbon is defined as a compound composed entirely of hydrogen and carbon atoms. The two general types of hydrocarbons are aliphatic and aromatic hydrocarbons. Aliphatic hydrocarbons are further subdivided into alkanes, alkenes, and alkynes. Alkanes are hydrocarbons with only single bonds, alkenes contain one or more double bonds, and alkynes contain one or more triple bonds.

2-Octene is an example of an alkene, which is a type of unsaturated aliphatic hydrocarbon. The term '2-octene' indicates that the hydrocarbon has eight carbon atoms (oct-) and a double bond (--ene) between the second and third carbon atoms, as implied by the number '2' in its name. The presence of this double bond is what allows us to classify 2-octene as an alkene, and its molecular formula can be approximated as CnH2n, which fits the general formula of alkenes.

Answer:

195.199grams

Explanation:

Fluorine has a molar mass of 18.99984 while calcium has a molar mass of calcium is 40.08.

1 mole of  calcium fluoride has a mass of 40.08+2×18.99984

=78.0797 grams

if one mole has a mass of 78.0797 grams, then 2.5 moles have:

2.5 moles× 78.0797 grams/mole= 195.1992 grams

Answer:

195

Explanation:

First, calculate the molar mass of CaF2:

Ca: 1 × 40.078 g/mol = 40.078 g/mol

F: 2 × 18.998 g/mol = 37.996 g/mol

40.078 g/mol + 37.996 g/mol = 78.074 g/mol CaF2

Then, convert moles to grams by multiplying the number of moles by the molar mass:

2.50 mol CaF2 × 78.074 g/mol CaF2 = 195 g CaF2

Answer:

Ethene reacting with hydrogen gas would produce ethane .

Explanation:

Hydrogenation of alkene gives alkane.

Hydrogenation of ethene gives the saturated hydrocarbon "ethane".

According to the equation:

C₂H₄ + H₂ → C₂H₆.